r-3(r-9)+4=5

Solution for r-3(r-9)+4=5 equation:

Simplifying
r + -3(r + -9) + 4 = 5

Reorder the terms:
r + -3(-9 + r) + 4 = 5
r + (-9 * -3 + r * -3) + 4 = 5
r + (27 + -3r) + 4 = 5

Reorder the terms:
27 + 4 + r + -3r = 5

Combine like terms: 27 + 4 = 31
31 + r + -3r = 5

Combine like terms: r + -3r = -2r
31 + -2r = 5

Solving
31 + -2r = 5

Solving for variable 'r'.

Move all terms containing r to the left, all other terms to the right.

Add '-31' to each side of the equation.
31 + -31 + -2r = 5 + -31

Combine like terms: 31 + -31 = 0
0 + -2r = 5 + -31
-2r = 5 + -31

Combine like terms: 5 + -31 = -26
-2r = -26

Divide each side by '-2'.
r = 13

Simplifying
r = 13